Disk-sharpener.



PATENTED DEC. 5, 1905.

J. I DEPEW. DISK SHARPENER.

' APPLIOATION FILED APR. 29,1905.

2 SHEETS-SHEBT 1.

PATENTED DEC. 5. 1905.

, I. I. DEPBW. DISK SHARPENER. APPLICATION FILED APR. 29,1905.

. 2 sHEETs -sHEBT 2. I

(Coca f4.

.is supported on legs 0.

j in). 806,244.

To all uzhom it may concern:

Be it known that I,.JAM s I.- DEPEW, aciti- 'zen oftheUnitedlStatesof America, and a resident ofLoup City, county of Sherman,

-. 5 State of Nebraska, have invented certain ,disk by shaving down its edge on the convex side of thedisk. Fig- 2is a perspective view showinga disk being sharpened by having its edge swageddown Fig.. 3, a' detail lvertical 1 section showing the disk as it appearswhile being rolled to an edge; Fig. 4, averticalsec- 'tion, and Figs. 5, 6, and 7 perspective viewsof detailshereinafterdescribed.

The object of thisinventionis to provide a simple apparatus for sharpening concave metal disks commonly used in several types of-agricultural im lements.

, .To the accomp ishmentofthis object and such others as may hereinafter appear the invention consists of the parts and combination of parts hereinafter .fully described, and particularly pointedout inthe appended claims, 'reference being had to the accompanying drawings, forming a part of this specication, in which the same reference charac- ,te'rs designatelike parts throughout the sevoral views i Referring to the drawings by reference characters, Adesignates thefront upper beam of the machine-frame D, the rear upright of the frame, which. is secured to thefront beam Aby side barsa by means of bolts a. The rear pedestal D is supported by suitable legs d. The front bar A is supported by afront pedestal or distance-piece 'B, which is bolted down to a lower cross-bar O by means of long bolts 1;, which are passed .up through the cross-bar O, the projecting1 endsof pedestal B, and through beam A an nuts I) on their upper ends. The front bar 0 J ournaled in the frame thus constructed are two shafts E and F, supportedone above the other and ar- The forward ends of these shafts are journaled, respectively, between-theupper cross.

bar A and the upper end of the distance- Specification'of Letters Patent. Application fi1ed Apri129f1906. Serial No. 258,065

ets d, bolted to the top of frame D by bolts clamped against the shoulder on the sha a nut e.

journalin t, whose lower end t is rotatably are provided with :LUNITFDS ATE PATENT OFFICE. AMESLL DEPEW, CITY, NEBRASKA I. IDI SK-"-SHARFIEINEF\-.I I

Patented Dec. 5,1905.

piece B and the lower end of distance-piece B and the lower cross-beam 0, space being left between the ends of the distance-piece and fthe gross-beams fora purpose hereinafter set ort ' On the rear end shaft F is mounted 'alarge worm-gear J, and meshing with this wormgear 1s a worm I, which is j'ournaled in brackd. On one end of the shaft '1', of the worm is fiXed'the driving step-pulley K. I

The forwardreduced ende of the shaft E projects'in front of'the frame and carries a eveled steel roll G, this roll beingri idtly t similar beveled roll H is clamped on thereduced end of the lower shaft F,

these two rolls beingof the same size and adapted to receive between them the edge of the disk to be rolled. A nut U, as shown in Figs. 2 and 5, serves to clamp the lower roll against its shoulder when the rolls are in action.

Referring to Fi s. 2 and 3 particularly, it/ will be observed t at the disk L, which is to be sharpened, is mounted rotatably in an upstandin tubular socket t, the disk being clarnpe .down on an annular shoulder. t of mounts in' said socket, .a nut t being screwed on the upper end of the journal-pin to clamp the disk in place. This socket t is iri idly mounted on a lever T, which is ivota y attached at itsinner end by a bolt s to a plate S, a suitable distance -washer .5 being interposed between the lever and the plate. This lever has a'limited vibratory movement onthe pivot-bolt 3 its arc of movement being limited by a curved slot S described from the center of pivot-bolt 8 the lever carrying a bolt 3 which passesup through said slot S and the lever, a distance-washer .9 being interposed between the lever and the plate. S. A nut is screwed onthe upper end of the bolt- 8 whereby the lever may be clamped in its ad'usted positions.

The plate S is carried by a-pair of arms 8, which extend inward, between the supports c'of the frame and are pivotally bolted thereto by horizontal bolts s lying at right angles to the axes of the shafts. E and F andin a vertical plane back of the rollers G and H.

The inner ends of the arms .9 are longitudinally slotted at s, through which slotsthe bolts 5 pass, whereby the plates may be adjusted inward and outward at will.

IIO

When the disk is on the journal-pin, as de scribed, all that is necessary to bring its edge between the rolls is to raise the lever T and slide the frame 8 inward or outward, as may be required by the diameter of the disk. The shortening of the distance-piece B, which holds its ends out of Contact with the beams A and O, insures the peripheries of the rolls comin into contact and permits wear on the 10 jou'rfna s to be compensated for. The de ree "or width of bevel desired may be obtaine by adjusting the lever T laterally.

Should it be desired to turn off the edge of the disk before rolling it, this may be done by means of a cutting-tool p, which is adjustably mounted in a socket p, being held in its adjusted position by means of a set-screw This socket is carriedv at the inner end of a ever P, which is pivotally mounted on a bracket 0 by means of a depending pin 19 which works in a slot 0' formed in said bracket. The bracket is bolted to one side of the frame, and the arm curves forwardly far enough to sup ort the tool-carrying lever 2 5 back of the ed e o the disk, so that by pressin backward on t e handle of lever p the tool will bebrought against the rear convex ed e of the disk, the necessary pressure being 0 tained by pressing backward on the lever. The tool p inclines upwardly and outwardly, so as to take into the metal of the disk at the proper angle to shave it off with the least degree of friction. The slot 0 permits the tool to be adjusted to accommodate disks of various sizes. The

5 pivot-bolt p is passed up loosely through slot 0 and screwed into the lever, so that by simply removing this bolt the lever may be removed. When this cuttingdevice is employed, the disk is mounted on the shaft F,

and in order to support it in proper relation to the tool the nut U is removed and washer M slipped over the projecting threaded end f, this washer being concaved for the reception of the convex surface of the disk. The outer 5 end of shaft F is further reduced at f. The

washer n is slipped on this extension f and is clamped against the disk by means of a nut f whereby the disk is rigidly held while rotating.

To support the edge of the disk where it is being cut by the tool, I employ a roller 1",

which bears upon the edge 0 the disk opposite the point of engagement of the tool, this roller being j eurnaled on a pin i, carried by a lever R. This lever R is pivoted on the lever P where it crosses the same b a vertical bolt 1, and its handle portion R 1s extended forwardly and outwardly, so as to lie adj acent to the handle P, on the opposite side from the roller 1", whereby the operator may by grasping the two handles and pressing them together cause a clamping action between the tool and the roller 1".

It will be apparent to those skilled in the art that various mechanical embodiments of the invention are possible, and I therefore do not wish to be limited to the exact arrangement and construction shown.

What I claim, and desire to secure by Letters Patent, is-

1. In a machine of the class described, the combination-of a frame, a pair of shafts and means for driving them, said shafts carrying a pair of beveled rolls, aplate S provided with a pair of arms 8 which extend inward under the rolls and are provided with slots, bolts slidingly and pivotally connecting these arms to adjacent parts of the frame, a lever pivoted at its inner end to said plate and carrying a socket, a clamp-bolt carried by the lever and working through an arcuate slot in said plate, and a journal-pin working in said socket and adapted to carry the disk to be sharpened, substantially as set forth.

2. In a machine of the class set forth, the combination of a frame, embracing an upper crossbeam, a lower cross-beam, a distancepiece or pedestal mounted between the same, long bolts clamping the up er cross-beam and the lower cross-beam an the intermediate distance-piece together, a pair of shafts and means for rotating them, sald shafts having their front ends journaled between the respective upper and lower ends of the distance-piece and the adjacent cross-beams, these shafts serving to separate the ends of the distance-piece from the res ective crossbeams, and a pair of beveled ro ls carried by the shafts, for the purpose set forth.

In testimony whereof I hereunto afiix my signature, in the presence of two witnesses, this 25th day of April, 1905.

JAMES I. DEPEW.

Witnesses:

B. NIGHTINGALE, R. J. N IGHTINGALE. 

